<template>
    <div>
        <nav-bar>
            <div slot="left" class="back" @click="backClick">
                <img src="~assets/img/common/back.svg" alt="">
            </div>
            <div slot="center" class="title">
                <div v-for="(item,index) in titles" 
                            class="title-item" 
                            :class="{active:currentIndex == index}" 
                            @click="titleClick(index)">{{item}}</div>
            </div>
        </nav-bar>
    </div>
</template>


<script>
import NavBar from 'components/common/navbar/NavBar'

export default {
    name:'DetailNavBar',
    components:{
        NavBar
    },
    data(){
        return {
            titles:['商品','参数','评论','推荐'],
            currentIndex:0
        }
    },
    methods:{
        titleClick(index){
            this.currentIndex = index
            this.$emit('titleClick',index)
        },
        backClick(){
            this.$router.back()
        }
    }
}
</script>


<style scoped>
    .title {
        display: flex;
        font-size: 12px;
    }

    .title-item {
        flex: 1;
    }

    .active {
        color: var(--color-high-text)
    }
    .back img{
        margin: 12px 0 0 20px;
    }
</style>